1 /*
2 * Copyright (c) 1999, 2022, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.code;
27
28 import java.util.Collection;
29 import java.util.Collections;
30 import java.util.EnumSet;
31 import java.util.HashMap;
32 import java.util.LinkedHashMap;
33 import java.util.Map;
34
35 import javax.lang.model.element.ElementVisitor;
36
37 import com.sun.tools.javac.code.Scope.WriteableScope;
38 import com.sun.tools.javac.code.Source.Feature;
39 import com.sun.tools.javac.code.Symbol.ClassSymbol;
40 import com.sun.tools.javac.code.Symbol.Completer;
41 import com.sun.tools.javac.code.Symbol.CompletionFailure;
42 import com.sun.tools.javac.code.Symbol.MethodSymbol;
43 import com.sun.tools.javac.code.Symbol.ModuleSymbol;
44 import com.sun.tools.javac.code.Symbol.PackageSymbol;
45 import com.sun.tools.javac.code.Symbol.RootPackageSymbol;
46 import com.sun.tools.javac.code.Symbol.TypeSymbol;
47 import com.sun.tools.javac.code.Symbol.VarSymbol;
48 import com.sun.tools.javac.code.Type.BottomType;
49 import com.sun.tools.javac.code.Type.ClassType;
50 import com.sun.tools.javac.code.Type.ErrorType;
51 import com.sun.tools.javac.code.Type.JCPrimitiveType;
52 import com.sun.tools.javac.code.Type.JCVoidType;
53 import com.sun.tools.javac.code.Type.MethodType;
54 import com.sun.tools.javac.code.Type.UnknownType;
55 import com.sun.tools.javac.code.Types.UniqueType;
56 import com.sun.tools.javac.comp.Modules;
57 import com.sun.tools.javac.jvm.Target;
58 import com.sun.tools.javac.util.Assert;
59 import com.sun.tools.javac.util.Context;
60 import com.sun.tools.javac.util.Convert;
61 import com.sun.tools.javac.util.DefinedBy;
62 import com.sun.tools.javac.util.DefinedBy.Api;
63 import com.sun.tools.javac.util.Iterators;
64 import com.sun.tools.javac.util.JavacMessages;
65 import com.sun.tools.javac.util.List;
66 import com.sun.tools.javac.util.Name;
67 import com.sun.tools.javac.util.Names;
68
69 import static com.sun.tools.javac.code.Flags.*;
70 import static com.sun.tools.javac.code.Kinds.Kind.*;
71 import static com.sun.tools.javac.code.TypeTag.*;
72
73 /** A class that defines all predefined constants and operators
74 * as well as special classes such as java.lang.Object, which need
75 * to be known to the compiler. All symbols are held in instance
76 * fields. This makes it possible to work in multiple concurrent
77 * projects, which might use different class files for library classes.
78 *
79 * <p><b>This is NOT part of any supported API.
80 * If you write code that depends on this, you do so at your own risk.
81 * This code and its internal interfaces are subject to change or
82 * deletion without notice.</b>
83 */
84 public class Symtab {
85 /** The context key for the symbol table. */
86 protected static final Context.Key<Symtab> symtabKey = new Context.Key<>();
87
88 /** Get the symbol table instance. */
89 public static Symtab instance(Context context) {
90 Symtab instance = context.get(symtabKey);
91 if (instance == null)
92 instance = new Symtab(context);
93 return instance;
94 }
95
96 /** Builtin types.
97 */
98 public final JCPrimitiveType byteType = new JCPrimitiveType(BYTE, null);
99 public final JCPrimitiveType charType = new JCPrimitiveType(CHAR, null);
100 public final JCPrimitiveType shortType = new JCPrimitiveType(SHORT, null);
101 public final JCPrimitiveType intType = new JCPrimitiveType(INT, null);
102 public final JCPrimitiveType longType = new JCPrimitiveType(LONG, null);
103 public final JCPrimitiveType floatType = new JCPrimitiveType(FLOAT, null);
104 public final JCPrimitiveType doubleType = new JCPrimitiveType(DOUBLE, null);
105 public final JCPrimitiveType booleanType = new JCPrimitiveType(BOOLEAN, null);
106 public final Type botType = new BottomType();
107 public final JCVoidType voidType = new JCVoidType();
108
109 private final Names names;
110 private final JavacMessages messages;
111 private final Completer initialCompleter;
112 private final Completer moduleCompleter;
113
114 /** A symbol for the unnamed module.
115 */
116 public final ModuleSymbol unnamedModule;
117
118 /** The error module.
119 */
120 public final ModuleSymbol errModule;
121
122 /** A symbol for no module, for use with -source 8 or less
123 */
124 public final ModuleSymbol noModule;
125
126 /** A symbol for the root package.
127 */
128 public final PackageSymbol rootPackage;
129
130 /** A symbol that stands for a missing symbol.
131 */
132 public final TypeSymbol noSymbol;
133
134 /** The error symbol.
135 */
136 public final ClassSymbol errSymbol;
137
138 /** The unknown symbol.
139 */
140 public final ClassSymbol unknownSymbol;
141
142 /** A value for the errType, with a originalType of noType */
143 public final Type errType;
144
145 /** A value for the unknown type. */
146 public final Type unknownType;
147
148 /** The builtin type of all arrays. */
149 public final ClassSymbol arrayClass;
150 public final MethodSymbol arrayCloneMethod;
151
152 /** VGJ: The (singleton) type of all bound types. */
153 public final ClassSymbol boundClass;
154
155 /** The builtin type of all methods. */
156 public final ClassSymbol methodClass;
157
158 /** A symbol for the java.base module.
159 */
160 public final ModuleSymbol java_base;
161
162 /** Predefined types.
163 */
164 public final Type objectType;
165 public final Type objectMethodsType;
166 public final Type exactConversionsSupportType;
167 public final Type objectsType;
168 public final Type classType;
169 public final Type classLoaderType;
170 public final Type stringType;
171 public final Type stringBufferType;
172 public final Type stringBuilderType;
173 public final Type cloneableType;
174 public final Type serializableType;
175 public final Type serializedLambdaType;
176 public final Type varHandleType;
177 public final Type methodHandleType;
178 public final Type methodHandlesType;
179 public final Type methodHandleLookupType;
180 public final Type methodTypeType;
181 public final Type nativeHeaderType;
182 public final Type throwableType;
183 public final Type errorType;
184 public final Type interruptedExceptionType;
185 public final Type illegalArgumentExceptionType;
186 public final Type exceptionType;
187 public final Type runtimeExceptionType;
188 public final Type classNotFoundExceptionType;
189 public final Type noClassDefFoundErrorType;
190 public final Type noSuchFieldErrorType;
191 public final Type assertionErrorType;
192 public final Type incompatibleClassChangeErrorType;
193 public final Type cloneNotSupportedExceptionType;
194 public final Type matchExceptionType;
195 public final Type annotationType;
196 public final TypeSymbol enumSym;
197 public final Type listType;
198 public final Type collectionsType;
199 public final Type comparableType;
200 public final Type comparatorType;
201 public final Type arraysType;
202 public final Type iterableType;
203 public final Type iteratorType;
204 public final Type annotationTargetType;
205 public final Type overrideType;
206 public final Type retentionType;
207 public final Type deprecatedType;
208 public final Type suppressWarningsType;
209 public final Type supplierType;
210 public final Type inheritedType;
211 public final Type profileType;
212 public final Type proprietaryType;
213 public final Type systemType;
214 public final Type autoCloseableType;
215 public final Type trustMeType;
216 public final Type lambdaMetafactory;
217 public final Type stringConcatFactory;
218 public final Type repeatableType;
219 public final Type documentedType;
220 public final Type elementTypeType;
221 public final Type functionalInterfaceType;
222 public final Type previewFeatureType;
223 public final Type previewFeatureInternalType;
224 public final Type restrictedType;
225 public final Type typeDescriptorType;
226 public final Type recordType;
227 public final Type switchBootstrapsType;
228 public final Type constantBootstrapsType;
229 public final Type classDescType;
230 public final Type enumDescType;
231
232 // For serialization lint checking
233 public final Type objectStreamFieldType;
234 public final Type objectInputStreamType;
235 public final Type objectOutputStreamType;
236 public final Type ioExceptionType;
237 public final Type objectStreamExceptionType;
238 // For externalization lint checking
239 public final Type externalizableType;
240 public final Type objectInputType;
241 public final Type objectOutputType;
242
243 // For string templates
244 public final Type stringTemplateType;
245 public final Type templateRuntimeType;
246 public final Type processorType;
247 public final Type linkageType;
248
249 // valhalla
250 public final Type valueBasedType;
251 public final Type valueBasedInternalType;
252 public final Type migratedValueClassType;
253 public final Type migratedValueClassInternalType;
254 public final Type strictType;
255 /** The symbol representing the finalize method on Object */
256 public final MethodSymbol objectFinalize;
257 public final Type numberType;
258
259 /** The symbol representing the length field of an array.
260 */
261 public final VarSymbol lengthVar;
262
263 /** The symbol representing the final finalize method on enums */
264 public final MethodSymbol enumFinalFinalize;
265
266 /** The symbol representing the close method on TWR AutoCloseable type */
267 public final MethodSymbol autoCloseableClose;
268
269 /** The predefined type that belongs to a tag.
270 */
271 public final Type[] typeOfTag = new Type[TypeTag.getTypeTagCount()];
272
273 /** The name of the class that belongs to a basic type tag.
274 */
275 public final Name[] boxedName = new Name[TypeTag.getTypeTagCount()];
276
277 /** A hashtable containing the encountered top-level and member classes,
278 * indexed by flat names. The table does not contain local classes.
279 * It should be updated from the outside to reflect classes defined
280 * by compiled source files.
281 */
282 private final Map<Name, Map<ModuleSymbol,ClassSymbol>> classes = new HashMap<>();
283
284 /** A hashtable containing the encountered packages.
285 * the table should be updated from outside to reflect packages defined
286 * by compiled source files.
287 */
288 private final Map<Name, Map<ModuleSymbol,PackageSymbol>> packages = new HashMap<>();
289
290 /** A hashtable giving the encountered modules.
291 */
292 private final Map<Name, ModuleSymbol> modules = new LinkedHashMap<>();
293
294 private final Map<Types.UniqueType, VarSymbol> classFields = new HashMap<>();
295
296 public VarSymbol getClassField(Type type, Types types) {
297 return classFields.computeIfAbsent(
298 new UniqueType(type, types), k -> {
299 Type arg = null;
300 if (type.getTag() == ARRAY || type.getTag() == CLASS)
301 arg = types.erasure(type);
302 else if (type.isPrimitiveOrVoid())
303 arg = types.boxedClass(type).type;
304 else
305 throw new AssertionError(type);
306
307 Type t = new ClassType(
308 classType.getEnclosingType(), List.of(arg), classType.tsym);
309 return new VarSymbol(
310 STATIC | PUBLIC | FINAL, names._class, t, type.tsym);
311 });
312 }
313
314 public void initType(Type type, ClassSymbol c) {
315 type.tsym = c;
316 typeOfTag[type.getTag().ordinal()] = type;
317 }
318
319 public void initType(Type type, String name) {
320 initType(
321 type,
322 new ClassSymbol(
323 PUBLIC, names.fromString(name), type, rootPackage));
324 }
325
326 public void initType(Type type, String name, String bname) {
327 initType(type, name);
328 boxedName[type.getTag().ordinal()] = names.fromString("java.lang." + bname);
329 }
330
331 /** The class symbol that owns all predefined symbols.
332 */
333 public final ClassSymbol predefClass;
334
335 /** Enter a class into symbol table.
336 * @param s The name of the class.
337 */
338 private Type enterClass(String s) {
339 return enterClass(java_base, names.fromString(s)).type;
340 }
341
342 public void synthesizeEmptyInterfaceIfMissing(final Type type) {
343 final Completer completer = type.tsym.completer;
344 type.tsym.completer = new Completer() {
345 @Override
346 public void complete(Symbol sym) throws CompletionFailure {
347 try {
348 completer.complete(sym);
349 } catch (CompletionFailure e) {
350 sym.flags_field |= (PUBLIC | INTERFACE);
351 ((ClassType) sym.type).supertype_field = objectType;
352 }
353 }
354
355 @Override
356 public boolean isTerminal() {
357 return completer.isTerminal();
358 }
359 };
360 }
361
362 public void synthesizeBoxTypeIfMissing(final Type type) {
363 ClassSymbol sym = enterClass(java_base, boxedName[type.getTag().ordinal()]);
364 final Completer completer = sym.completer;
365 sym.completer = new Completer() {
366 @Override
367 public void complete(Symbol sym) throws CompletionFailure {
368 try {
369 completer.complete(sym);
370 } catch (CompletionFailure e) {
371 sym.flags_field |= PUBLIC;
372 ((ClassType) sym.type).supertype_field = objectType;
373 MethodSymbol boxMethod =
374 new MethodSymbol(PUBLIC | STATIC, names.valueOf,
375 new MethodType(List.of(type), sym.type,
376 List.nil(), methodClass),
377 sym);
378 sym.members().enter(boxMethod);
379 MethodSymbol unboxMethod =
380 new MethodSymbol(PUBLIC,
381 type.tsym.name.append(names.Value), // x.intValue()
382 new MethodType(List.nil(), type,
383 List.nil(), methodClass),
384 sym);
385 sym.members().enter(unboxMethod);
386 }
387 }
388
389 @Override
390 public boolean isTerminal() {
391 return completer.isTerminal();
392 }
393 };
394 }
395
396 // Enter a synthetic class that is used to mark classes in ct.sym.
397 // This class does not have a class file.
398 private Type enterSyntheticAnnotation(String name) {
399 // for now, leave the module null, to prevent problems from synthesizing the
400 // existence of a class in any specific module, including noModule
401 ClassType type = (ClassType)enterClass(java_base, names.fromString(name)).type;
402 ClassSymbol sym = (ClassSymbol)type.tsym;
403 sym.completer = Completer.NULL_COMPLETER;
404 sym.flags_field = PUBLIC|ACYCLIC|ANNOTATION|INTERFACE;
405 sym.erasure_field = type;
406 sym.members_field = WriteableScope.create(sym);
407 type.typarams_field = List.nil();
408 type.allparams_field = List.nil();
409 type.supertype_field = annotationType;
410 type.interfaces_field = List.nil();
411 return type;
412 }
413
414 /** Constructor; enters all predefined identifiers and operators
415 * into symbol table.
416 */
417 @SuppressWarnings("this-escape")
418 protected Symtab(Context context) throws CompletionFailure {
419 context.put(symtabKey, this);
420
421 names = Names.instance(context);
422
423 // Create the unknown type
424 unknownType = new UnknownType();
425
426 messages = JavacMessages.instance(context);
427
428 MissingInfoHandler missingInfoHandler = MissingInfoHandler.instance(context);
429
430 Target target = Target.instance(context);
431 rootPackage = new RootPackageSymbol(names.empty, null,
432 missingInfoHandler,
433 target.runtimeUseNestAccess());
434
435 // create the basic builtin symbols
436 unnamedModule = new ModuleSymbol(names.empty, null) {
437 {
438 directives = List.nil();
439 exports = List.nil();
440 provides = List.nil();
441 uses = List.nil();
442 ModuleSymbol java_base = enterModule(names.java_base);
443 com.sun.tools.javac.code.Directive.RequiresDirective d =
444 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
445 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
446 requires = List.of(d);
447 }
448 @Override
449 public String toString() {
450 return messages.getLocalizedString("compiler.misc.unnamed.module");
451 }
452 };
453 addRootPackageFor(unnamedModule);
454 unnamedModule.enclosedPackages = unnamedModule.enclosedPackages.prepend(unnamedModule.unnamedPackage);
455
456 errModule = new ModuleSymbol(names.empty, null) {
457 {
458 directives = List.nil();
459 exports = List.nil();
460 provides = List.nil();
461 uses = List.nil();
462 ModuleSymbol java_base = enterModule(names.java_base);
463 com.sun.tools.javac.code.Directive.RequiresDirective d =
464 new com.sun.tools.javac.code.Directive.RequiresDirective(java_base,
465 EnumSet.of(com.sun.tools.javac.code.Directive.RequiresFlag.MANDATED));
466 requires = List.of(d);
467 }
468 };
469 addRootPackageFor(errModule);
470
471 noModule = new ModuleSymbol(names.empty, null) {
472 @Override public boolean isNoModule() {
473 return true;
474 }
475 };
476 addRootPackageFor(noModule);
477
478 noSymbol = new TypeSymbol(NIL, 0, names.empty, Type.noType, rootPackage) {
479 @Override @DefinedBy(Api.LANGUAGE_MODEL)
480 public <R, P> R accept(ElementVisitor<R, P> v, P p) {
481 return v.visitUnknown(this, p);
482 }
483 };
484
485 // create the error symbols
486 errSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.any, null, rootPackage);
487 errType = new ErrorType(errSymbol, Type.noType);
488
489 unknownSymbol = new ClassSymbol(PUBLIC|STATIC|ACYCLIC, names.fromString("<any?>"), null, rootPackage);
490 unknownSymbol.members_field = new Scope.ErrorScope(unknownSymbol);
491 unknownSymbol.type = unknownType;
492
493 // initialize builtin types
494 initType(byteType, "byte", "Byte");
495 initType(shortType, "short", "Short");
496 initType(charType, "char", "Character");
497 initType(intType, "int", "Integer");
498 initType(longType, "long", "Long");
499 initType(floatType, "float", "Float");
500 initType(doubleType, "double", "Double");
501 initType(booleanType, "boolean", "Boolean");
502 initType(voidType, "void", "Void");
503 initType(botType, "<nulltype>");
504 initType(errType, errSymbol);
505 initType(unknownType, unknownSymbol);
506
507 // the builtin class of all arrays
508 arrayClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Array, noSymbol);
509
510 // VGJ
511 boundClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Bound, noSymbol);
512 boundClass.members_field = new Scope.ErrorScope(boundClass);
513
514 // the builtin class of all methods
515 methodClass = new ClassSymbol(PUBLIC|ACYCLIC, names.Method, noSymbol);
516 methodClass.members_field = new Scope.ErrorScope(boundClass);
517
518 // Create class to hold all predefined constants and operations.
519 predefClass = new ClassSymbol(PUBLIC|ACYCLIC, names.empty, rootPackage);
520 WriteableScope scope = WriteableScope.create(predefClass);
521 predefClass.members_field = scope;
522
523 // Get the initial completer for Symbols from the ClassFinder
524 initialCompleter = ClassFinder.instance(context).getCompleter();
525 rootPackage.members_field = WriteableScope.create(rootPackage);
526
527 // Enter symbols for basic types.
528 scope.enter(byteType.tsym);
529 scope.enter(shortType.tsym);
530 scope.enter(charType.tsym);
531 scope.enter(intType.tsym);
532 scope.enter(longType.tsym);
533 scope.enter(floatType.tsym);
534 scope.enter(doubleType.tsym);
535 scope.enter(booleanType.tsym);
536 scope.enter(errType.tsym);
537
538 // Enter symbol for the errSymbol
539 scope.enter(errSymbol);
540
541 Source source = Source.instance(context);
542 if (Feature.MODULES.allowedInSource(source)) {
543 java_base = enterModule(names.java_base);
544 //avoid completing java.base during the Symtab initialization
545 java_base.completer = Completer.NULL_COMPLETER;
546 java_base.visiblePackages = Collections.emptyMap();
547 } else {
548 java_base = noModule;
549 }
550
551 // Get the initial completer for ModuleSymbols from Modules
552 moduleCompleter = Modules.instance(context).getCompleter();
553
554 // Enter predefined classes. All are assumed to be in the java.base module.
555 objectType = enterClass("java.lang.Object");
556 throwableType = enterClass("java.lang.Throwable");
557 objectFinalize = new MethodSymbol(PROTECTED,
558 names.finalize,
559 new MethodType(List.nil(), voidType,
560 List.of(throwableType), methodClass),
561 objectType.tsym);
562 objectMethodsType = enterClass("java.lang.runtime.ObjectMethods");
563 exactConversionsSupportType = enterClass("java.lang.runtime.ExactConversionsSupport");
564 objectsType = enterClass("java.util.Objects");
565 classType = enterClass("java.lang.Class");
566 stringType = enterClass("java.lang.String");
567 stringBufferType = enterClass("java.lang.StringBuffer");
568 stringBuilderType = enterClass("java.lang.StringBuilder");
569 cloneableType = enterClass("java.lang.Cloneable");
570 serializableType = enterClass("java.io.Serializable");
571 serializedLambdaType = enterClass("java.lang.invoke.SerializedLambda");
572 varHandleType = enterClass("java.lang.invoke.VarHandle");
573 methodHandleType = enterClass("java.lang.invoke.MethodHandle");
574 methodHandlesType = enterClass("java.lang.invoke.MethodHandles");
575 methodHandleLookupType = enterClass("java.lang.invoke.MethodHandles$Lookup");
576 methodTypeType = enterClass("java.lang.invoke.MethodType");
577 errorType = enterClass("java.lang.Error");
578 illegalArgumentExceptionType = enterClass("java.lang.IllegalArgumentException");
579 interruptedExceptionType = enterClass("java.lang.InterruptedException");
580 exceptionType = enterClass("java.lang.Exception");
581 runtimeExceptionType = enterClass("java.lang.RuntimeException");
582 classNotFoundExceptionType = enterClass("java.lang.ClassNotFoundException");
583 noClassDefFoundErrorType = enterClass("java.lang.NoClassDefFoundError");
584 noSuchFieldErrorType = enterClass("java.lang.NoSuchFieldError");
585 assertionErrorType = enterClass("java.lang.AssertionError");
586 incompatibleClassChangeErrorType = enterClass("java.lang.IncompatibleClassChangeError");
587 cloneNotSupportedExceptionType = enterClass("java.lang.CloneNotSupportedException");
588 matchExceptionType = enterClass("java.lang.MatchException");
589 annotationType = enterClass("java.lang.annotation.Annotation");
590 classLoaderType = enterClass("java.lang.ClassLoader");
591 enumSym = enterClass(java_base, names.java_lang_Enum);
592 enumFinalFinalize =
593 new MethodSymbol(PROTECTED|FINAL|HYPOTHETICAL,
594 names.finalize,
595 new MethodType(List.nil(), voidType,
596 List.nil(), methodClass),
597 enumSym);
598 listType = enterClass("java.util.List");
599 collectionsType = enterClass("java.util.Collections");
600 comparableType = enterClass("java.lang.Comparable");
601 comparatorType = enterClass("java.util.Comparator");
602 arraysType = enterClass("java.util.Arrays");
603 iterableType = enterClass("java.lang.Iterable");
604 iteratorType = enterClass("java.util.Iterator");
605 annotationTargetType = enterClass("java.lang.annotation.Target");
606 overrideType = enterClass("java.lang.Override");
607 retentionType = enterClass("java.lang.annotation.Retention");
608 deprecatedType = enterClass("java.lang.Deprecated");
609 suppressWarningsType = enterClass("java.lang.SuppressWarnings");
610 supplierType = enterClass("java.util.function.Supplier");
611 inheritedType = enterClass("java.lang.annotation.Inherited");
612 repeatableType = enterClass("java.lang.annotation.Repeatable");
613 documentedType = enterClass("java.lang.annotation.Documented");
614 elementTypeType = enterClass("java.lang.annotation.ElementType");
615 systemType = enterClass("java.lang.System");
616 autoCloseableType = enterClass("java.lang.AutoCloseable");
617 autoCloseableClose = new MethodSymbol(PUBLIC,
618 names.close,
619 new MethodType(List.nil(), voidType,
620 List.of(exceptionType), methodClass),
621 autoCloseableType.tsym);
622 trustMeType = enterClass("java.lang.SafeVarargs");
623 nativeHeaderType = enterClass("java.lang.annotation.Native");
624 lambdaMetafactory = enterClass("java.lang.invoke.LambdaMetafactory");
625 stringConcatFactory = enterClass("java.lang.invoke.StringConcatFactory");
626 functionalInterfaceType = enterClass("java.lang.FunctionalInterface");
627 previewFeatureType = enterClass("jdk.internal.javac.PreviewFeature");
628 previewFeatureInternalType = enterSyntheticAnnotation("jdk.internal.PreviewFeature+Annotation");
629 restrictedType = enterClass("jdk.internal.javac.Restricted");
630 typeDescriptorType = enterClass("java.lang.invoke.TypeDescriptor");
631 recordType = enterClass("java.lang.Record");
632 switchBootstrapsType = enterClass("java.lang.runtime.SwitchBootstraps");
633 constantBootstrapsType = enterClass("java.lang.invoke.ConstantBootstraps");
634 valueBasedType = enterClass("jdk.internal.ValueBased");
635 valueBasedInternalType = enterSyntheticAnnotation("jdk.internal.ValueBased+Annotation");
636 strictType = enterSyntheticAnnotation("jdk.internal.vm.annotation.Strict");
637 migratedValueClassType = enterClass("jdk.internal.MigratedValueClass");
638 migratedValueClassInternalType = enterSyntheticAnnotation("jdk.internal.MigratedValueClass+Annotation");
639 classDescType = enterClass("java.lang.constant.ClassDesc");
640 enumDescType = enterClass("java.lang.Enum$EnumDesc");
641 // For serialization lint checking
642 objectStreamFieldType = enterClass("java.io.ObjectStreamField");
643 objectInputStreamType = enterClass("java.io.ObjectInputStream");
644 objectOutputStreamType = enterClass("java.io.ObjectOutputStream");
645 ioExceptionType = enterClass("java.io.IOException");
646 objectStreamExceptionType = enterClass("java.io.ObjectStreamException");
647 externalizableType = enterClass("java.io.Externalizable");
648 objectInputType = enterClass("java.io.ObjectInput");
649 objectOutputType = enterClass("java.io.ObjectOutput");
650 synthesizeEmptyInterfaceIfMissing(autoCloseableType);
651 synthesizeEmptyInterfaceIfMissing(cloneableType);
652 synthesizeEmptyInterfaceIfMissing(serializableType);
653 synthesizeEmptyInterfaceIfMissing(lambdaMetafactory);
654 synthesizeEmptyInterfaceIfMissing(serializedLambdaType);
655 synthesizeEmptyInterfaceIfMissing(stringConcatFactory);
656 synthesizeBoxTypeIfMissing(doubleType);
657 synthesizeBoxTypeIfMissing(floatType);
658 synthesizeBoxTypeIfMissing(voidType);
659
660 // For string templates
661 stringTemplateType = enterClass("java.lang.StringTemplate");
662 templateRuntimeType = enterClass("java.lang.runtime.TemplateRuntime");
663 processorType = enterClass("java.lang.StringTemplate$Processor");
664 linkageType = enterClass("java.lang.StringTemplate$Processor$Linkage");
665
666 numberType = enterClass("java.lang.Number");
667
668 // Enter a synthetic class that is used to mark internal
669 // proprietary classes in ct.sym. This class does not have a
670 // class file.
671 proprietaryType = enterSyntheticAnnotation("sun.Proprietary+Annotation");
672
673 // Enter a synthetic class that is used to provide profile info for
674 // classes in ct.sym. This class does not have a class file.
675 profileType = enterSyntheticAnnotation("jdk.Profile+Annotation");
676 MethodSymbol m = new MethodSymbol(PUBLIC | ABSTRACT, names.value, intType, profileType.tsym);
677 profileType.tsym.members().enter(m);
678
679 // Enter a class for arrays.
680 // The class implements java.lang.Cloneable and java.io.Serializable.
681 // It has a final length field and a clone method.
682 ClassType arrayClassType = (ClassType)arrayClass.type;
683 arrayClassType.supertype_field = objectType;
684 arrayClassType.interfaces_field = List.of(cloneableType, serializableType);
685 arrayClass.members_field = WriteableScope.create(arrayClass);
686 lengthVar = new VarSymbol(
687 PUBLIC | FINAL,
688 names.length,
689 intType,
690 arrayClass);
691 arrayClass.members().enter(lengthVar);
692 arrayCloneMethod = new MethodSymbol(
693 PUBLIC,
694 names.clone,
695 new MethodType(List.nil(), objectType,
696 List.nil(), methodClass),
697 arrayClass);
698 arrayClass.members().enter(arrayCloneMethod);
699
700 if (java_base != noModule)
701 java_base.completer = moduleCompleter::complete; //bootstrap issues
702
703 }
704
705 /** Define a new class given its name and owner.
706 */
707 public ClassSymbol defineClass(Name name, Symbol owner) {
708 ClassSymbol c = new ClassSymbol(0, name, owner);
709 c.completer = initialCompleter;
710 return c;
711 }
712
713 /** Create a new toplevel or member class symbol with given name
714 * and owner and enter in `classes' unless already there.
715 */
716 public ClassSymbol enterClass(ModuleSymbol msym, Name name, TypeSymbol owner) {
717 Assert.checkNonNull(msym);
718 Name flatname = TypeSymbol.formFlatName(name, owner);
719 ClassSymbol c = getClass(msym, flatname);
720 if (c == null) {
721 c = defineClass(name, owner);
722 doEnterClass(msym, c);
723 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP &&
724 c.owner.kind == PCK && ((c.flags_field & FROM_SOURCE) == 0)) {
725 // reassign fields of classes that might have been loaded with
726 // their flat names.
727 c.owner.members().remove(c);
728 c.name = name;
729 c.owner = owner;
730 c.fullname = ClassSymbol.formFullName(name, owner);
731 }
732 return c;
733 }
734
735 public ClassSymbol getClass(ModuleSymbol msym, Name flatName) {
736 Assert.checkNonNull(msym, flatName::toString);
737 return classes.getOrDefault(flatName, Collections.emptyMap()).get(msym);
738 }
739
740 public PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName) {
741 return lookupPackage(msym, flatName, false);
742 }
743
744 private PackageSymbol lookupPackage(ModuleSymbol msym, Name flatName, boolean onlyExisting) {
745 Assert.checkNonNull(msym);
746
747 if (flatName.isEmpty()) {
748 //unnamed packages only from the current module - visiblePackages contains *root* package, not unnamed package!
749 return msym.unnamedPackage;
750 }
751
752 if (msym == noModule) {
753 return enterPackage(msym, flatName);
754 }
755
756 msym.complete();
757
758 PackageSymbol pack;
759
760 pack = msym.visiblePackages.get(flatName);
761
762 if (pack != null)
763 return pack;
764
765 pack = getPackage(msym, flatName);
766
767 if ((pack != null && pack.exists()) || onlyExisting)
768 return pack;
769
770 boolean dependsOnUnnamed = msym.requires != null &&
771 msym.requires.stream()
772 .map(rd -> rd.module)
773 .anyMatch(mod -> mod == unnamedModule);
774
775 if (dependsOnUnnamed) {
776 //msyms depends on the unnamed module, for which we generally don't know
777 //the list of packages it "exports" ahead of time. So try to lookup the package in the
778 //current module, and in the unnamed module and see if it exists in one of them
779 PackageSymbol unnamedPack = getPackage(unnamedModule, flatName);
780
781 if (unnamedPack != null && unnamedPack.exists()) {
782 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
783 return unnamedPack;
784 }
785
786 pack = enterPackage(msym, flatName);
787 pack.complete();
788 if (pack.exists())
789 return pack;
790
791 unnamedPack = enterPackage(unnamedModule, flatName);
792 unnamedPack.complete();
793 if (unnamedPack.exists()) {
794 msym.visiblePackages.put(unnamedPack.fullname, unnamedPack);
795 return unnamedPack;
796 }
797
798 return pack;
799 }
800
801 return enterPackage(msym, flatName);
802 }
803
804 private static final Map<ModuleSymbol, ClassSymbol> EMPTY = new HashMap<>();
805
806 public void removeClass(ModuleSymbol msym, Name flatName) {
807 classes.getOrDefault(flatName, EMPTY).remove(msym);
808 }
809
810 public Iterable<ClassSymbol> getAllClasses() {
811 return () -> Iterators.createCompoundIterator(classes.values(), v -> v.values().iterator());
812 }
813
814 private void doEnterClass(ModuleSymbol msym, ClassSymbol cs) {
815 classes.computeIfAbsent(cs.flatname, n -> new HashMap<>()).put(msym, cs);
816 }
817
818 /** Create a new member or toplevel class symbol with given flat name
819 * and enter in `classes' unless already there.
820 */
821 public ClassSymbol enterClass(ModuleSymbol msym, Name flatname) {
822 Assert.checkNonNull(msym);
823 PackageSymbol ps = lookupPackage(msym, Convert.packagePart(flatname));
824 Assert.checkNonNull(ps);
825 Assert.checkNonNull(ps.modle);
826 ClassSymbol c = getClass(ps.modle, flatname);
827 if (c == null) {
828 c = defineClass(Convert.shortName(flatname), ps);
829 doEnterClass(ps.modle, c);
830 return c;
831 } else
832 return c;
833 }
834
835 /** Check to see if a package exists, given its fully qualified name.
836 */
837 public boolean packageExists(ModuleSymbol msym, Name fullname) {
838 Assert.checkNonNull(msym);
839 PackageSymbol pack = lookupPackage(msym, fullname, true);
840 return pack != null && pack.exists();
841 }
842
843 /** Make a package, given its fully qualified name.
844 */
845 public PackageSymbol enterPackage(ModuleSymbol currModule, Name fullname) {
846 Assert.checkNonNull(currModule);
847 PackageSymbol p = getPackage(currModule, fullname);
848 if (p == null) {
849 Assert.check(!fullname.isEmpty(), () -> "rootPackage missing!; currModule: " + currModule);
850 p = new PackageSymbol(
851 Convert.shortName(fullname),
852 enterPackage(currModule, Convert.packagePart(fullname)));
853 p.completer = initialCompleter;
854 p.modle = currModule;
855 doEnterPackage(currModule, p);
856 }
857 return p;
858 }
859
860 private void doEnterPackage(ModuleSymbol msym, PackageSymbol pack) {
861 packages.computeIfAbsent(pack.fullname, n -> new HashMap<>()).put(msym, pack);
862 msym.enclosedPackages = msym.enclosedPackages.prepend(pack);
863 }
864
865 private void addRootPackageFor(ModuleSymbol module) {
866 doEnterPackage(module, rootPackage);
867 PackageSymbol unnamedPackage = new PackageSymbol(names.empty, rootPackage) {
868 @Override
869 public String toString() {
870 return messages.getLocalizedString("compiler.misc.unnamed.package");
871 }
872 };
873 unnamedPackage.modle = module;
874 //we cannot use a method reference below, as initialCompleter might be null now
875 unnamedPackage.completer = s -> initialCompleter.complete(s);
876 unnamedPackage.flags_field |= EXISTS;
877 module.unnamedPackage = unnamedPackage;
878 }
879
880 public PackageSymbol getPackage(ModuleSymbol module, Name fullname) {
881 return packages.getOrDefault(fullname, Collections.emptyMap()).get(module);
882 }
883
884 public ModuleSymbol enterModule(Name name) {
885 ModuleSymbol msym = modules.get(name);
886 if (msym == null) {
887 msym = ModuleSymbol.create(name, names.module_info);
888 addRootPackageFor(msym);
889 msym.completer = s -> moduleCompleter.complete(s); //bootstrap issues
890 modules.put(name, msym);
891 }
892 return msym;
893 }
894
895 public ModuleSymbol getModule(Name name) {
896 return modules.get(name);
897 }
898
899 //temporary:
900 public ModuleSymbol inferModule(Name packageName) {
901 if (packageName.isEmpty())
902 return java_base == noModule ? noModule : unnamedModule;//!
903
904 ModuleSymbol msym = null;
905 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
906 if (map == null)
907 return null;
908 for (Map.Entry<ModuleSymbol,PackageSymbol> e: map.entrySet()) {
909 if (!e.getValue().members().isEmpty()) {
910 if (msym == null) {
911 msym = e.getKey();
912 } else {
913 return null;
914 }
915 }
916 }
917 return msym;
918 }
919
920 public List<ModuleSymbol> listPackageModules(Name packageName) {
921 if (packageName.isEmpty())
922 return List.nil();
923
924 List<ModuleSymbol> result = List.nil();
925 Map<ModuleSymbol,PackageSymbol> map = packages.get(packageName);
926 if (map != null) {
927 for (Map.Entry<ModuleSymbol, PackageSymbol> e: map.entrySet()) {
928 if (!e.getValue().members().isEmpty()) {
929 result = result.prepend(e.getKey());
930 }
931 }
932 }
933 return result;
934 }
935
936 public Collection<ModuleSymbol> getAllModules() {
937 return modules.values();
938 }
939
940 public Iterable<ClassSymbol> getClassesForName(Name candidate) {
941 return classes.getOrDefault(candidate, Collections.emptyMap()).values();
942 }
943
944 public Iterable<PackageSymbol> getPackagesForName(Name candidate) {
945 return packages.getOrDefault(candidate, Collections.emptyMap()).values();
946 }
947 }